Fastening ring for fluid valve



FIG. 1 is a top plan view of a fastening ring for fluid valve showing my design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof, the right side being substantially identical to the left side shown; and

FIG. 6 is a cross-sectional view thereof. 

The ornamental design of a fastening ring for fluid valve, as shown and described. 